AEST to AST
-14hAEST
AESTSOURCEAST
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and AST on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and AST (Atlantic Standard Time) timezone regions across the globe.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •Puerto Rico uses AST year-round and does not observe DST.
- •AST is 1 hour ahead of EST.
- •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
Comparing Time Zones: AEST and AST
AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts AEST 14 hours behind AST — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in AEST it is 7:00 PM in AST on the previous day. Midnight in AEST is 10:00 AM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AEST to AST time conversion table
| AEST (AEST) | AST (AST) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert AEST to AST time
- Scheduling a call from AEST to AST: a 10:00 AM start in AEST lands at 8:00 PM in AST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: AEST and AST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AST is 7:00 PM in AEST.
- Booking travel or deliveries: tracking AST local time against AEST keeps pickup windows and arrival estimates honest across the -14h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week AEST takes the early slot, the next week AST does.
About AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
About AST (Atlantic Standard Time)
Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.
Best time to call between AEST and AST
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. AST opens at 9:00 AM AST, which is 7:00 PM in AEST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
AEST and AST have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
AEST is 14 hours behind AST (AEST UTC+10:00 → AST UTC-04:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AEST
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between AEST and AST?
AEST (AEST, UTC+10:00) is 14 hours behind AST (AST, UTC-04:00). The gap is currently -14h.
How do I convert AEST time to AST time?
Add -14h to AEST local time. For example, 9:00 AM in AEST is 7:00 PM in AST (previous day).
What time is it in AST right now?
AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from AEST.
What is the best time to call AST from AEST?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in AEST, which is 11:00 PM in AST.
Which is behind, AEST or AST?
AEST is 14 hours behind AST. When it is 12:00 PM in AEST it is 10:00 PM in AST.
Does daylight saving time affect the AEST–AST difference?
Neither zone observes daylight saving time, so the -14h offset between AEST and AST is fixed all year.
Which other cities share AEST's time zone?
AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
Which countries use AEST, AEST's zone?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Is there a day difference between AEST and AST?
Sometimes. The -14h gap is large enough that 8:00 PM or later in AEST already falls on the in AST.
What is the time difference between AEST and AST?
AST is -14h from AEST.
What timezone is AEST in?
AEST operates on its local timezone.
What timezone is AST in?
AST operates on its local timezone.
Which countries use AEST (Australian Eastern Standard Time)?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Does AEST observe daylight saving time?
Yes, AEST switches to AEDT during summer months.
What are some interesting facts about AEST?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
Which cities are in the AST timezone?
Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
What is the UTC offset for AST?
Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.
What should I know about the AST timezone?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
When is it midnight in AEST, what time is it in AST?
When it is 12:00 AM (midnight) in AEST (AEST), it is -14h later in AST (AST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More AEST time conversions
- aest to sydney
- aest to aedt
- aest to new york
- aest to london
- aest to dubai
- aest to tokyo
- aest to singapore
- aest to los angeles
- aest to paris
- aest to delhi
- aest to mumbai
- aest to berlin
- aest to hong kong
- aest to toronto
- aest to kathmandu
- new york to aest
- london to aest
- dubai to aest
- tokyo to aest
- singapore to aest
- sydney to aest
- los angeles to aest
- paris to aest
- delhi to aest
- mumbai to aest
- berlin to aest
- hong kong to aest
- toronto to aest
- kathmandu to aest
See every conversion from AEST →·See every conversion from AST →